Senior Backend Python Engineer

About us

M47 Labs is an AI Engineering company focused on providing businesses with the latest and most advanced Artificial Intelligence solutions. Our deep expertise in AI Language Technologies, including NLP and LLMs, empowers businesses with custom-built cutting-edge solutions. We are dedicated to creating AI-driven applications that can understand, interpret, and respond to human language. Join us in making the future more intelligent.

About you

We are seeking a Senior Python Backend Developer to join our team and contribute to the development of AI products in the Customer Experience (CX) field.

About your day-to-day:

•  You will work closely with Machine Learning Engineers, Product Managers, and Frontend Developers to design, build, and maintain scalable backend systems.

• You will play a key role in ensuring the performance, reliability and seamless integration of backend services with machine learning models and user-facing applications.

  
  

What is in it for you?

💪🏽 Indefinite Contract

☀️ Office located at the heart of Barcelona

🚀 Follow your career ambition with growth opportunities (horizontal and vertical)

📚On-demand learning budget and ongoing educational company-wide training of relevant topics of our industry

💸 Comprehensive compensation package, including private medical insurance, expert tax support, coverage and flexible remuneration through Cobee, including meals and transport

🌈 Be part of our diverse communities and enjoy our meet-ups (Women in Tech, LGTBQ+, Wellbeing, City Lifestyle...)

🌍 Great international, inclusive and dynamic work environment (more than 20 nationalities!)

Requirements

What you'll need:

• 6+ years of experience in Backend roles.

• Strong proficiency in Python and backend system design.

• Experience leading technical projects and mentoring team members.

• Strong communication skills in English.

• Bachelor’s degree in Computer Science or equivalent experience.

• Solid understanding of database systems (e.g., PostgreSQL, MySQL) and experience with testing frameworks (e.g., Pytest).

• Experience with modern CI/CD practices and tools (e.g., GitLab CI, ArgoCD).

• Proven ability to write reliable, maintainable, and well-tested code, with a focus on automation and quality assurance.

• Familiarity with Docker for containerization

What's nice to have:

• Experience with AWS infrastructure and services as developer (S3, RDS)

• Knowledge of frontend frameworks to collaborate with frontends team

• Exposure to SonarQube or other code quality tools.

• Familiarity with languages like .NET and dealing with legacy code is a plus.

For this position, you must be a holder of a valid working permit for Spain (or EU passport) and be available to work full-time onsite.

**M47 Labs not only encourages but is actively working on empowering its diverse and inclusive talent. M47 Labs is committed to ensure a non-discriminative workplace, work life and selection process and such decisions will not be influenced by race, color, religion, gender identity or expression, sexual orientation, disability, social and conjugal status, age or other applicable characteristics. M47 Labs prohibits discrimination and harassment of any kind and all employment is decided on the basis of qualifications, merit, and business needs.**

In accordance with the provisions of Regulation (EU) 2016/679 of 27 April (GDPR) and the Organic Law 3/2018 of 5 December (LOPDGDD), we inform you that personal data and email addresses collected from the Data Subject will be processed under the responsibility of M47 LABS & INTERNATIONAL FIDUCIA SL for a legitimate interest and for the purpose of sending communications about our products and services and will be retained for as long as none of the parties object. The data will not be communicated to third parties, unless under legal obligation. You can exercise your rights of access, rectification, portability and erasure of your data and those of restriction and objection to their processing by contacting DIPUTACIÓ, 279 4 4 - 08007 BARCELONA (Barcelona). E-mail: info@m47labs.com. If you consider that the processing does not comply with current legislation, you may file a complaint with the Spanish supervisory authority at www.aepd.es.